Some find my true nature to be rather frightening, and for some reason he is one of the only creatures not of my own kin able to see the parts that spill from this weaker body I inhabit. The child is familiar with the body, but not myself, and it would seem it is uncomfortable for him to see this body puppeteered by anyone but the original inhabitants.
He confirmed watching from a distance also frightened him, but that has been noted and corrected. Beyond that, I see no reason for him to be afraid, these are minor concerns at best.